Sensa ya oxygen oxygen (NOx sensor) ndi sensor yomwe imagwiritsidwa ntchito kuti izindikire zomwe zili mu nitrogen oxides (NOx) monga N2O, no, NO2, N2O3, N2O4 ndi N2O5 mu injini yotulutsa mpweya.Malinga ndi mfundo yogwirira ntchito, imatha kugawidwa m'ma electrochemical, optical ndi masensa ena a NOx.Kugwiritsa madulidwe a olimba electrolyte yttrium okusayidi doped zirconia (YSZ) ceramic zinthu kwa ayoni mpweya, kusankha chothandizira tilinazo wapadera NOx tcheru elekitirodi zakuthupi NOx mpweya, ndi kuphatikiza ndi kachipangizo wapadera kachipangizo kupeza magetsi chizindikiro cha NOx, potsiriza, ntchito kuzindikira kwapadera kofooka kwa ma siginecha ndiukadaulo wowongolera bwino wamagetsi, mpweya wa NOx muutsi wamagalimoto umadziwika ndikusinthidwa kukhala ma siginecha a digito a CAN.
Ntchito ya nitrogen oxygen sensor
- Muyezo wa NOx: 0-1500 / 2000 / 3000ppm NOx
- O2 muyeso: 0 - 21%
- Kutentha kwakukulu kwa gasi: 800 ℃
- angagwiritsidwe ntchito pansi pa O2 (21%), HC, Co, H2O (< 12%)
- kulumikizana mawonekedwe: akhoza
Gawo la ntchito ya NOx sensor
- injini ya dizilo yotulutsa mpweya wa SCR (yokumana ndi miyezo ya National IV, V ndi VI)
- Makina opangira mafuta a injini yamafuta otulutsa mpweya
- desulfurization ndi denitration kuzindikira ndi kulamulira dongosolo la magetsi
Kupanga kwa nitrogen oxygen sensor
Zigawo zazikuluzikulu za sensa ya NOx ndi zida za ceramic komanso zigawo za SCU
Core ya NOx sensor
Chifukwa cha chilengedwe chogwiritsira ntchito mwapadera, chipangizo cha ceramic chimapangidwa ndi electrochemical structure.Mapangidwewa ndi ovuta, koma chizindikiro chotulutsa chimakhala chokhazikika, liwiro la kuyankha ndilofulumira, ndipo moyo wautumiki ndi wautali.Chogulitsacho chimakumana ndi kuwunika kwa NOx zomwe zili mumayendedwe agalimoto ya dizilo.Magawo okhudzidwa ndi ceramic ali ndi ma cavities angapo amkati a ceramic, ophatikiza zirconia, alumina ndi mitundu yosiyanasiyana ya Pt zitsulo zopangira zitsulo.Njira yopanga ndizovuta, kulondola kusindikiza kwa skrini kumafunika, ndipo zofunikira zofananira za chilinganizo cha zinthu / kukhazikika ndi njira ya sintering ndizofunikira.
Pakadali pano, pali masensa atatu wamba a NOx pamsika: pini lathyathyathya, pini inayi ndi mapini anayi anayi.
NOx sensor imatha kulumikizana
Sensor ya NOx imalumikizana ndi ECU kapena DCU kudzera pakulankhulana.Msonkhano wa NOx umaphatikizidwa mkati ndi njira yodzizindikiritsa yokha (sensa ya nayitrogeni ndi mpweya imatha kumaliza gawo ili palokha popanda kufunikira ECU kapena DCU kuti iwerengere kuchuluka kwa nayitrogeni ndi oxygen).Imayang'anira momwe ikugwirira ntchito ndikubwezeretsanso chizindikiro cha NOx ku ECU kapena DCU kudzera mu basi yolumikizirana ndi thupi.
Kusamala pakuyika kwa NOx sensor
Pulojekiti ya NOx sensor idzayikidwa pa theka lapamwamba la chothandizira cha chitoliro chotulutsa mpweya, ndipo kafukufuku wa sensa sadzakhala pa malo otsika kwambiri a chothandizira.Pewani kupendekera kwa mpweya wa nayitrogeni kuti zisaphwanyike mukakumana ndi madzi.Kuyika kolowera kwa nayitrogeni oxygen control unit: ikani gawo lowongolera molunjika kuti muteteze bwino.Zofunikira pakutentha kwa gawo lowongolera sensa ya NOx: sensor ya nayitrogeni ndi oxygen sizimayikidwa m'malo omwe kutentha kwambiri.Ndibwino kuti musakhale kutali ndi chitoliro chotulutsa mpweya komanso pafupi ndi thanki ya urea.Ngati sensa ya okosijeni iyenera kuikidwa pafupi ndi chitoliro chotulutsa mpweya ndi thanki ya urea chifukwa cha dongosolo la galimoto yonse, chishango cha kutentha ndi thonje la kutentha kuyenera kuikidwa, ndipo kutentha kozungulira malo oyikapo kuyenera kuyesedwa.Kutentha kogwira ntchito bwino sikuposa 85 ℃.
Ntchito yoteteza mame: chifukwa electrode ya NOx sensor imafuna kutentha kwakukulu kuti igwire ntchito, NOx sensor ili ndi ceramic mkati mwake.Ma Ceramics sangathe kukhudza madzi kutentha kwambiri, ndipo ndi kosavuta kukulitsa ndi kugwirizanitsa akakumana ndi madzi, zomwe zimapangitsa kuti ceramic iwonongeke.Choncho, sensa ya NOx idzakhala ndi ntchito yoteteza mame, yomwe iyenera kudikirira kwa nthawi yaitali mutazindikira kuti kutentha kwa chitoliro chotulutsa mpweya kumafika pamtengo wokhazikitsidwa.ECU kapena DCU ikuganiza kuti pansi pa kutentha kwakukulu, ngakhale madzi atakhala pa NOx sensor, adzawombedwa ndi mpweya wotentha kwambiri.
Kuzindikira ndi kuzindikira kwa NOx sensor
Sensor ya NOx ikamagwira ntchito bwino, imazindikira mtengo wa NOx mu chitoliro chotulutsa mu nthawi yeniyeni ndikuibwezera ku ECU / DCU kudzera pa basi ya CAN.ECU sichimaweruza ngati kuthako kumakhala koyenerera pozindikira mtengo weniweni wa NOx, koma amawona ngati mtengo wa NOx mu chitoliro chotulutsa mpweya umaposa muyezo kudzera mu pulogalamu yowunika ya NOx.Kuti mugwiritse ntchito kuzindikira kwa NOx, zotsatirazi ziyenera kukwaniritsidwa:
Dongosolo la madzi ozizira limagwira ntchito bwino popanda zizindikiro zolakwika.Palibe cholakwika cha sensor ya ambient pressure.
Kutentha kwamadzi kumapitilira 70 ℃.Kuzindikira kwathunthu kwa NOx kumafuna zitsanzo pafupifupi 20.Pambuyo pa kuzindikira kumodzi kwa NOx, ECU / DCU idzafanizitsa deta yotsatiridwa: ngati mtengo wamtengo wapatali wa sampuli zonse za NOx ndizocheperapo kusiyana ndi zomwe zimayikidwa panthawi yozindikira, kuzindikira kumadutsa.Ngati mtengo wapakati wa sampuli zonse za NOx uli wokulirapo kuposa mtengo womwe wakhazikitsidwa pakuzindikiridwa, wowunikirayo amalemba zolakwika.Komabe, nyali ya mil siyaka.Ngati kuwunika sikulephera kawiri motsatizana, makinawo adzanena za Super 5 ndi super 7 zolakwika, ndipo nyali ya mil idzayatsa.
Pamene nambala yolakwika ya 5 ipyola, nyali ya mil idzakhala yoyaka, koma torque sidzakhala yochepa.Pamene nambala yolakwika ya 7 idutsa, nyali ya mil idzayatsidwa ndipo dongosolo lidzachepetsa torque.Malire a torque amayikidwa ndi wopanga chitsanzo.
Zindikirani: ngakhale zolakwika zamtundu wina zitakonzedwa, nyali ya mil sizima, ndipo vuto lidzawonetsedwa ngati mbiri yakale.Pankhaniyi, ndikofunikira kupukuta deta kapena kuchita ntchito yapamwamba yokonzanso NOx.
Kutengera zaka 22 zamakampani azaka zamakampani komanso luso lamphamvu la R & D, Yunyi Electric wagwiritsa ntchito gulu la akatswiri apanyumba ndikuphatikiza zida zamagulu atatu a R & D padziko lonse lapansi kuti akwaniritse luso lalikulu pakuwongolera sensa ya NOx. ma aligorivimu a mapulogalamu ndi mafananidwe ofananira ndi zinthu, ndikuthana ndi zowawa zamsika, zidasokoneza ukadaulo waukadaulo, kulimbikitsa chitukuko ndi sayansi ndiukadaulo, komanso kutsimikizika kwaukadaulo ndiukadaulo.Ngakhale kuti magetsi a Yunyi amathandizira kupanga masensa a NOx pamlingo wapamwamba, kuchuluka kwa kupanga kukupitilira kukula, kotero kuti ma sensor a nitrogen a Yunyi ndi okosijeni akhazikitsa chizindikiro chabwino mumakampani!
Nthawi yotumiza: Sep-02-2022